merozygote

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出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2013/06/25 10:36:41」(JST)

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Merozygote is a state when a cell, usually bacterial, is temporarily diploid as result of DNA transfer processes like conjugation.

One example of how merozygotes can be formed is the transfer of genetic material during an HFR transformation. In HFR transformation, an F+ prokaryote transfers its F-factor into an Hfr cell. This F-factor plasmid is incorporated into Hfr DNA. When Hfr mates with an F- cell, the chromosome acts as a rolling circle transferring information across a conjugation bridge. The F-factor is the last thing on the circle and often isn't transferred to the F- cell, so it remains an F- cell, but has all the extra genetic information from the transferred Hfr chromosome. This temporary partial diploid of the DNA may lead to recombination between the corresponding portions of the DNA, so that the genetic material of the donor may be incorporated into the chromosome of the recipient, thereby altering the genotype of the recipient. However, if no recombination occurs, the linear fragment of donor DNA in the recipient cytoplasm will be lost after one cycle. These merozygotes help to study dominance variation and mutation can be known.

English Journal

• [Genetic study of the mechanism of tandem duplication formation in conjugational crosses in Escherichia coli K-12].

• Sukhodolets VV1.
• Genetika.Genetika.1997 Nov;33(11):1487-93.
• The formation of heterozygous tandem duplications of the deo operon was studied in conjugational matings HfrH deoA deoB::Tn5 thyA x HfrH deoC deoD thyA. When the HfrH deoC deoD thr::Tn9 car::Tn10 thyA donor strain was used, the thr::Tn9 and car::Tn10 transposon insertions linked to the deo operon we
• PMID 9480212

• Approaches to half-tetrad analysis in bacteria: recombination between repeated, inverse-order chromosomal sequences.

• Segall AM1, Roth JR.
• Genetics.Genetics.1994 Jan;136(1):27-39.
• In standard bacterial recombination assays, a linear fragment of DNA is transferred to a recipient cell and, at most, a single selected recombinant type is recovered from each merozygote. This contrasts with fungal systems, for which tetrads allow recovery of all meiotic products, including both ult
• PMID 8138164

• The effect of chemicals on induction of recombination in an F' histidine merozygote of Escherichia coli.

• Rich D, Goldschmidt EP.
• Mutation research.Mutat Res.1980 Sep;72(2):327-8.
• PMID 7003369

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• mérozygote - Dictionnaire des Sciences Animales

merozygote Définition Bactérie partiellement diploïde qui résulte du transfert d'une partie de chromosome d'une bactérie à une autre. La partie transférée est dite exogénote. Section pathologie Voir aussi diploïde Pour citer cet ...

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